Locking-latch.



H. A. PALMER.

LOOKING LATCH.

APPLICATION nun mm: 23, 1913.

1,085,292, Patented Jan 27, 1914.

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ATTORNEY COLUMBIA PLANOGRAPH CO.,WASHINOTON n c tavern sans HARRY A.PALMER, OF MERIDEN, CONNECTICUT, ASSIGNOR TO FOSTER, MERRIAM ANDCOMPANY, OF MERIDEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCKINGLATCH.

Specification of Letters Patent.

Patented Jan. 27, 1914.

Application filed June 23, 1913. Serial No. 775,440.

Ta 77 unborn, it may concern.

Be it known that I, HARRY A. PALMER, a citizen of the United States,residing at lleriden, county of New Haven, State of Connecticut. haveinvented an Improvement in Locking-Latches, of which the following is aspecification.

This invention relates to locking latches adapted for general use andespecially adapted for use on refrigerator doors and the like, and theintention has for its object to pro vide a device of this characterwhich shall be strong and durable, and efficient and reliable inoperation and in which the number of parts and the cost of constructionshall be reduced to the minimum.

il ith these and other objects in view I have devised the novel combinedlatch and lock of which the following description in connection with theaccompanying drawing is a specification, reference characters being usedto indicate the several parts.

Figure 1 is a rear elevation of my nov el locking latch detached, thetumbler belng 1n the unlocking position; Fig. 2 a similar 'iew, thetumbler being in the locking position. and Fig. 3 is a section on theline 3-3 in Fig. 1, looking in the direction of the arrows.

10 denotes a case which is provided with flanges 11 having holes forattaching screws, and 12 a cover plate which rests upon posts 13 in thecase.

l-l denotes the latch which is pivoted on a hub 15 projecting from thecase and is provided with a tailpiece 16 and an upwardly projecting arm17.

18 denotes a sliding tumbler which moves upon rests on the wall of thecasing (see dotted lines, Fig. 2) and the rear end of which rests upon astud 19. The tumbler is provided with a downwardly projecting lockingarm 20, with looking recesses 21 and with a curved wall 22 which isadapted to be engaged by the bit of a key (not shown). The latch isnormally retained in the locking position and the tumbler is retained ineither the locking or the unlocking positions by a single coil spring23, the ends of which bear respectively upon the latch and the tumblerand which is retained in place by lugs 2ft on the latch and tumblerrespectively which extend within the coils of the spring.

25 denotes a key hole and 26 a key hub which is adapted to oscillate inthe case and cover plate, the ends of said hub being mounted, in theusual manner, in holes in thecase and cover plate.

2? denotes an operating lever pivoted between ears 28 on the outer sideof the case. The operating arm of said lever lies at an angle to thehandle arm and projects through a slot 29 in the case and engages thetail-piece of the latch to operate the same.

The tumbler is moved from the unlocking position as in Fig. 1 to thelocking position as in Fig. 2, and vice versa, by the engagement of thebit of a key (not shown) with the curved wall 22 on the tumbler. vVhenthe tumbler is in the position shown in Fig. 1, the latch may be readilylifted as indicated by dotted lines in Fig. 1 by swinging the handle armof the operating lever outward. This causes the operating arm of saidlever to bear upon the tail-piece of the latch and lift the latch asindicated by dotted lines in Fig. 1. \Vhen the tumbler is in the lockingposition as in Fig. 2, looking arm 20 on the tumbler will be in verticalalinement with arm 17 of the latch and will prevent the latch from beinglifted by manipulation of the operating lever, and will likewise coverthe opening in the case through which the latch projects. I thus avoidthe necessity for a special form of keeper and render it impossible topush the tumbler back and release the latch.

30 denotes a locking lug on the case which is adapted to engage eitherof the locking recesses 21 in the tumbler to retain the tumbler ineither the looking or the unlocking position. It will be noted that boththe locking lug and the locking recesses are rounded so that when thepower of the key is applied to move the tumbler in either direction thepower of the spring will be overcome, the spring yielding sufficientlyto permit the tumbler to be moved by the key and instantly returning thetumbler to its normal position, that is with one of the locking recessesengaged by the locking lug, the instant the longitudinal movement of thetumbler has been effected by the key. It will be noted. furthermore thatin the unlocking position of the tumbler locking arm 20 is wholly out ofthe way of arm 17 on the latch and permits the latter to be raisedfreely as indicated by dotted lines in Fig. 1.

Having thus described my invention I claim z LA device of the characterdescribed comprising a pivoted latch having an upwardly projecting arm,a sliding tumbler having a downwardly projecting arm adapted to beplaced in vertical alinement with the upwardly projecting arm of thelatch to lock the latch against operation, and a spring engaging thetumbler and the latch and acting to hold the latch in the lockingposition and the tumbler in either the locking or the unlockingposition.

2. A device of the character described comprising a case, a pivotedlatch projecting through the case and having an upwardly projecting armwhich covers the hole through which the latch projects, a slidingtumbler having a downwardly projecting arm adapted to be placed invertical alinement with the arm of the latch to lock the latch againstoperation, and a spring engaging both the tumbler and the latch,substantially as described, for the purpose specified.

3. A device of the character described comprising a latch having atail-piece and an upwardly projecting arm, means acting on thetail-piece to lift the latch, a sliding tumbler having a downwardlyprojecting arm adapted to be engaged by the arm on the latch to lock thelatch against operation and a spring engaging the tumbler and the latchand acting to hold the latch in the locking position and the tumbler ineither the locking or unlocking position.

4:. The combination with a case having a locking lug, latch pivoted tothe case and having an upwardly projecting arm and a tail-piece, andmeans acting on the tailpiece to lift the latch, of a sliding tumblerhaving a downwardly projecting arm adapted to be engaged by the latchand having locking recesses adapted to be engaged by the locking lug,for the purpose set forth, and a spring acting on both the tumbler andthe lug.

In testimony whereof I aflix my signa ture in presence of two witnesses.

HARRY A. PALMER Witnesses BLAINE COGGINS, R. \V. MILLARD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

